<template>
  <div class="login-container">
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      autocomplete="on"
      label-position="left"
    >
      <div class="title-container">
        <h3 class="title">登录</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="用户名"
          name="username"
          type="text"
          tabindex="1"
          autocomplete="on"
        />
      </el-form-item>

      <el-tooltip
        v-model="capsTooltip"
        content="Caps lock is On"
        placement="right"
        manual
      >
        <el-form-item prop="password">
          <span class="svg-container">
            <svg-icon icon-class="password" />
          </span>
          <el-input
            :key="passwordType"
            ref="password"
            v-model="loginForm.password"
            :type="passwordType"
            placeholder="密码"
            name="password"
            tabindex="2"
            autocomplete="on"
            @keyup.native="checkCapslock"
            @blur="capsTooltip = false"
            @keyup.enter.native="handleLogin"
          />
          <span class="show-pwd" @click="showPwd">
            <svg-icon
              :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"
            />
          </span>
        </el-form-item>
      </el-tooltip>

      <el-row>
        <el-col :span="11">
          <el-form-item prop="code">
            <span class="svg-container">
              <i class="el-icon-picture" />
            </span>
            <el-input
              ref="code"
              v-model="loginForm.code"
              placeholder="验证码"
              name="code"
              type="text"
              tabindex="1"
              autocomplete="on"
            />
          </el-form-item>
        </el-col>

        <el-col style="padding-top: 5px" :span="11" :offset="2">
          <el-image
            :src="checkCodeImgUrl"
            style="width: 80%; height: 80%"
            fit="fill"
            @click.native="refreshCheckCode"
          />
        </el-col>
      </el-row>

      <el-button
        :loading="loading"
        type="primary"
        style="width: 100%; margin-bottom: 30px"
        @click.native.prevent="handleLogin"
      >
        Login
      </el-button>

      <el-row>
        <el-col :span="12" :offset="14">
          <el-select
            v-model="selectedInSysId"
            placeholder="活动区域"
            style="width: 100%"
          >
            <el-option
              v-for="item in insysList"
              :key="item.insysid"
              :label="item.sysname"
              :value="item.insysid"
            />
          </el-select>
        </el-col>
      </el-row>
    </el-form>
  </div>
</template>

<script>
import store from "@/store/";
import http from "@/utils/http";
import { getAllInSys } from "@/api/env";

export default {
  name: "Login",
  data() {
    return {
      loginForm: {
        username: "",
        password: "",
        code: "",
      },
      loginRules: {
        username: [
          { required: true, trigger: "blur", message: "用户名不能为空" },
        ],
        password: [
          { required: true, trigger: "blur", message: "密码不能为空" },
        ],
        code: [{ required: true, trigger: "blur", message: "验证码不能为空" }],
      },

      insysList: [],
      selectedInSysId: 0,
      passwordType: "password",
      capsTooltip: false,
      loading: false,
      redirect: undefined,
      otherQuery: {},
      checkCodeImgUrl: "",
    };
  },
  watch: {
    $route: {
      handler: function (route) {
        const query = route.query;
        if (query) {
          this.redirect = query.redirect;
          this.otherQuery = this.getOtherQuery(query);
        }
      },
      immediate: true,
    },
  },
  async mounted() {
    if (this.loginForm.username === "") {
      this.$refs.username.focus();
    } else if (this.loginForm.password === "") {
      this.$refs.password.focus();
    }
    this.refreshCheckCode();
    const insys = await getAllInSys();
    this.$data.insysList = insys;
  },
  methods: {
    checkCapslock(e) {
      const { key } = e;
      this.capsTooltip = key && key.length === 1 && key >= "A" && key <= "Z";
    },
    showPwd() {
      if (this.passwordType === "password") {
        this.passwordType = "";
      } else {
        this.passwordType = "password";
      }
      this.$nextTick(() => {
        this.$refs.password.focus();
      });
    },
    handleLogin() {
      this.$refs.loginForm.validate(async (valid) => {
        const { username, password, code } = this.$data.loginForm;
        const { insysList, selectedInSysId } = this.$data;
        if (valid) {
          let system;
          for (let i = 0; i < insysList.length; i++) {
            if (insysList[i].insysid === selectedInSysId) {
              system = insysList[i];
            }
          }

          // 登录
          await store.dispatch("user/login", {
            username,
            password,
            code,
            system,
          });

          if (await store.dispatch("user/hasLogin")) {
            this.$router.push({ path: "/" });
          } else {
            // 登录没成功就刷新验证码
            this.refreshCheckCode();
          }
        }
      });
    },

    refreshCheckCode() {
      this.$data.checkCodeImgUrl =
        http.defaults.baseURL +
        "/User/create_code_img2/?" +
        Math.round(Math.random() * 100000);
    },
    getOtherQuery(query) {
      return Object.keys(query).reduce((acc, cur) => {
        if (cur !== "redirect") {
          acc[cur] = query[cur];
        }
        return acc;
      }, {});
    },
  },
};
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }

  .thirdparty-button {
    background-color: $dark_gray;
    position: absolute;
    right: 0;
    bottom: 6px;
    border-color: $bg;
  }

  @media only screen and (max-width: 470px) {
    .thirdparty-button {
      display: none;
    }
  }
}
</style>
